Psychology is the Science of Mental Life, both of its phenomena and their conditions.

What was bright and exciting becomes weary, flat, and unprofitable.

Behavioral psychology is the science of pulling habits out of rats.

Science must constantly be reminded that her purposes are not the only purposes and that the order of uniform causation which she has use for may be enveloped in a wider order.

Science is as corruptible a human activity as any other.

It means you have to keep up with the science, even if your character still relies on psychology.